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. operating substantially as described, and for the purpose set forth.

@when gisten isteut @fitta GEORGE l). GANSTER, O F NEW YORK, N'. Y.

Letters Patent No. 62,482, dated February 25, 1867; anteidated February 22, 1867.

IMPROVEMENT IN STEAM ENGINES.

TO ALL WHOM IT MAY CONCERN:

Be it known that I, GEORGE l?. (rANs'rI-zn, ofthe city, county, and State of New York, have invented a new and improved Steam Engine or Cylinder; and I do hereby declare that the following is a full and exact description thereof, reference being hadv to the accompanying drawings and to the letters of reference marked thereon, like letters representing like parts in the several figures.

The nature of my invention consists in having two piston Vheads in a steam cylinder, lone on each side of a crank-shaft passing transversely through the said cylinder.

To enable others skilled in the artto make and use my invention, I will proceed to describeits construction and operation. In the drawings- Figure 1 represents a side elevation of my cylinder or engine.

Figure 2, an elevation of the reverse side; and

Figure 3, a central vertical and longitudinal section.

Figure 4, the parts inside of'cylinder.

,A represents the cylinder, and B its bed or support. C and C are the two cylinder heads. inside, D and D represent the usual piston heads, each one having several arms, el, extending longitudinally to the other piston head, making a nice fit with the other, and forming another cylinder within the outer one. At top and bottom, however, and on each side, thereare openings or spaces, those on the sides permitting this inner piston cylinder" to move longitudinally along the crank-shaft E, whilst the top and bottom openings permit ythe vertical movement ofl two sliding boxes, F F', embracing the crank. These boxes have a dove-tail tit on two guides, G G', attached respectively to each piston head. These piston heads are held in position, that is, in juxtaposition-- not being able to separate-by any suitable connection, such as bolts and screws, nuts, Ste., extending from one to the other. The crank-shaft passes' through suitable openings, e e, on each side of the cylinder, and is supported in suitable `boxes or bearings on each side. H is a pulley,on one side, from which motion may be transmitted by a belt, or it may be a cog-wheel. On the other end of shaft there is a wheel, it; it is connected to an arm, G, attached to or dropping-down from valve I. This wheel L acts as a crank, operates the valve, lets in steam from either side, and regulates the exhaust. `The peculiar shape of valve, as shown in cross-section, will illustrate how the steam, entering the pipe or openingp on the top, (communicating with boiler in any of the usual ways,) will permit the steam to pass down either of the passages or channels q on top of cylinder, operate on either piston head, at same time exhaust at other side through the side opening L. The steam, in pressing upon either piston or head D or D', by means of the guides G G and sliding boxes. F F, gives a rotary motion to crank-shaft E, and through this and pulley or cog-Wheel attached, power is communicated :1s desired. Thus it will be seen that what is in the cylinder, or directly attached to it, comprises the whole engine, and whilst much expense is saved, no power is lost. The heads D D are packed in any suitable manner; and it is believed my cylinder or engine will eost about one-third the usual price of an ordinary engine oi' same power.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent of the United States, is-

l. The combination of D D', crank-shaft E, arm G, and valvcl.

2. The combination of D D', guides G G', box F F, crank-shaft E, arm G", and valve i, arranged and GEORGE P. GANSTER. Witnesses:

Raman H. PLAss, S. S. FAnNns'rocK. 

